 For six years he co-hosted a public affairs program, "Citywatchers", on KCET with columnist Art Seidenbaum.He has interviewed hundreds of film personalities, first on the Z Channel's "On the Film Scene" in Los Angeles, then with "Champlin on Film" on Bravo Cable.Champlin taught film criticism at Loyola Marymount University from 1969 to 1985, was adjunct professor of film at USC from 1985 to 1996, and has also taught at UC Irvine and the AFI Conservatory.